Skin Boil (Furuncle): Causes, Symptoms & Treatment

What Is a Skin Boil?

A boil (furuncle) is a bacterial infection (usually Staphylococcus aureus) of a hair follicle, causing a painful, pus-filled lump.

Common Locations

Face, neck, armpits, buttocks, thighs—areas with hair follicles.

Symptoms

• Red, tender bump that enlarges over days
• White/yellow pus center
• Pain, warmth, swelling
• Fever, chills, fatigue (severe cases)

Treatment

• Warm compresses to promote drainage
• Antibiotics (if spreading or severe)
• Pain relievers
• Surgical drainage (if needed)

Prevention

• Good hygiene (handwashing, clean skin)
• Avoid sharing razors, towels
• Cover cuts/wounds
• Treat skin infections promptly